30 years revisit survey for long-term changes in the Antarctic subtidal algal assemblage
30 years revisit survey for long-term changes in the Antarctic subtidal algal assemblage
复制标题
30年重访南极潮下藻类群落长期变化
作者：
Y. Ko;Han;Dong Seok Lee;Jeong Ha Kim
通过对南极乔治王岛（KGI）麦克斯韦湾潮下带大型藻类群落30年后的重访调查，研究了该海域大型藻类群落的长期变化。在2016-2018年期间，在六个地点进行了SCUBA潜水的实地调查，以直接与1988-1993年在相同地点进行的调查进行比较。大型藻类的种类总数与上一次调查和本次调查相似，分别为25种和27种。然而，大型藻类组合变化很大，平均相似性为48.2%的两个调查之间。此外，物种一级的丰度在调查之间表现出很高的变异性。另一方面，在30年的时间间隔内，在站点之间的层次结构在潮下带社区的麦克斯韦湾的整体变化不大。企鹅栖息地附近的地点始终显示出最高的生物多样性，这表明南极沿海栖息地陆地养分输入的重要性。30年来的一个显著变化是Desmarestia complex和Plocamium cartilagineum的增加和Himantothallus grandifolius的减少。这两个群体仍然占主导地位，但从Himantothallus到Desmarestia-Plocamium的转变可能反映了与过去相比，麦克斯韦湾海岸的温度上升。
A long-term change of a subtidal macroalgal assemblage has been investigated in Maxwell Bay, King George Island (KGI) of the Antarctic coast by a revisit survey after 30 years. Field surveys were done by SCUBA diving at six sites in 2016–2018 to directly compare with the previous survey conducted in 1988–1993 at the same sites. The total number of macroalgal species was similar between the previous and the present survey, 25 and 27 species respectively. However, the macroalgal assemblage changed substantially with the average similarity of 48.2% between the two surveys. Also, the species-level abundance showed a high variability between surveys. On the other hand, over the 30 years interval there was little overall change at the between-site level hierarchical structure in the subtidal communities of Maxwell Bay. The sites near the penguin rookery consistently showed the highest biodiversity, indicating the importance of land-based nutrients input in Antarctic coastal habitats. A noticeable pattern change over 30 years was the increase of Desmarestia complex and Plocamium cartilagineum and the decrease of Himantothallus grandifolius . Both groups are still dominant, but the shift from Himantothallus to Desmarestia-Plocamium may reflects temperature rise on the Maxwell Bay coast compared to the past.
影响因子：
30.7
作者：
Smale, Dan A.;Wernberg, Thomas;Moore, Pippa J.
通讯作者：
Moore, Pippa J.